Comment by klibertp

> Sounds like there is the functionality, but lacking the visual cues/affordances?

Yeah, some things are missing (arbitrarily moving control to a given line (even if it precedes the current one) in a function, stepping into some functions[1]), but mostly they're there, just clunky to access and view. It's getting better, though - I checked the cookbook page[2] and found a project[3] that I didn't notice previously, which should help quite a bit with convenience. Even with that, though, LispWorks[4] still looks better... ;)

[1] The ones compiled with a low `debug` setting; they're either impossible to step into, or you land in the decompiled source. Trying to step into a function call should recompile that function automatically with debug instrumentation enabled.

[2] https://lispcookbook.github.io/cl-cookbook/debugging.html

[3] https://github.com/mmontone/slime-breakpoints

[4] https://www.lispworks.com/images/lw-ide-cocoa.png